uncle.utils.PropsUtil Maven / Gradle / Ivy

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package uncle.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * Created by hujianbo on 2018/1/18.
 */
public class PropsUtil {

    private static final Logger LOGGER = LoggerFactory.getLogger(PropsUtil.class);

    /*
    * 加载属性文件
    *
    * */
    public static Properties loadProps(String fileName) {
        Properties properties = null;
        InputStream inputStream = null;
        try {
            inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
            if (inputStream == null) {
                throw new FileNotFoundException(fileName + " file is not found!");
            }
            properties = new Properties();
            properties.load(inputStream);
        } catch (IOException e) {
            LOGGER.error("load properties file failure", e);
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    LOGGER.error("close input stream failure", e);
                }
            }
        }
        return properties;
    }

    /*
    * 获取字符型属性（默认为空字符串）
    *
    * */
    public static String getString(Properties props, String key) {
        return getString(props, key, "");
    }

    /*
    * 获取字符型属性（可指定默认值）
    * */
    public static String getString(Properties props, String key, String
            defaultValue) {
        String value = defaultValue;
        if (props.containsKey(key)) {
            value = props.getProperty(key);
        }
        return value;
    }

    /*
    * 获取数值类型属性（默认为0）
    * */
    public static int getInt(Properties props, String key) {
        return getInt(props, key, 0);
    }

    /*
    * 获取数值类型属性（可指定默认值）
    * */
    public static int getInt(Properties props, String key, int defaultValue) {
        int value = defaultValue;
        if (props.containsKey(key)) {
            value = CastUtil.castInt(props.getProperty(key));
        }
        return value;
    }

    /*
    * 获取布尔型属性（默认值为false）
    * */
    public static boolean getBoolean(Properties props, String key) {
        return getBoolean(props, key, false);
    }

    /*
    * 获取布尔型属性（可指定默认值）
    * */
    public static boolean getBoolean(Properties props, String key, Boolean defaultValue) {
        boolean value = defaultValue;
        if (props.containsKey(key)) {
            value = CastUtil.castBoolean(props.getProperty(key));
        }
        return value;
    }
}